Warp stop motion



Aug. 4, 1931. J. REGAN 1,317,167

' WARP STOP MOTION Filed July 28, 1930 2 Sheets-Sheet .l

Aug. 4,1931. J. REGAN WARP STOP MOTION Filed July 28, 1930 2 Sheets-Sheet 2 MFA/75F (7072 /V PEG/9N Patented Aug. 4, 1931 UNITED STATES PATENT OFFHIE JOHN REG-AN, OF NEW BEIDFORD, MASSACHUSETTS, ASSIGNOR TO CROMPTON 85 KNOWLES LOOM WORKS, F WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS WARP STOP MOTION Application filed July 28, 1930. Serial No. 471,193.

This invention relates to a warp stop motion particularly designed for use in a loom, such as a plush loom, in which a very large number of warp threads are used.

It is the object of my invention to provide a stop motion in which a greatly increased number of drop wires may be used, which drop wires are disposed in a plurality of stop motion units.

A further object of the invention is to provide an enlarged stop motion so designed that the indicating or control mechanism only is duplicated and that only a single set of actuating and knock-01f mechanism is required.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.

A preferred form of the invention is shown 2 in the drawings, in which Fig. 1 is a side elevation of parts of a plush loom having my improvements embodied therein;

Fig. 2 is an enlarged side elevation of the 25 stop motion;

Fig. 3 is a diagrammatic view illustrating the operation of the knock-ofl mechanism; and

Fig. 4 is a detail plan view, looking in the 30 direction of the arrow 4: in Fig. 2.

Referring to the drawings, I have shown portions of a loom in which a double plush or similar fabric may be woven, said loom comprising loom frame members and 11.

The warp threads used in weaving such a fabric are commonly disposed in three planes to form upper and lower sheds. Ground or hinder warp threads WV are drawn from upper and lower warp beams and 16 and pile 40 warp threads P are drawn from a supplemental upper warp beam, not shown.

My improved stop motion is arranged in three units A, B and C and the pile warp threads P are preferably led to the harnesses 45 through the middle stop motion unit B. The ground warp threads are preferably drawn through the upper and lower stop motion units A and C.

By this construction, drop wires of differ- 50 ent thickness or weight may be used for the two kinds of warp threads W and P if so desired. For instance, the pile warp threads P may be much finer and lighter than the ground warp threads ll, and may require the use of correspondingly lighter drop wires.

The general construction of the stop motion is best shown in Fig. 2. The drop wires D are formed with openings therein enlarged at their lower portions and reduced at their upper ends and within these openings longitudinally extended indicating bars 20 are yieldingly oscillated.

hen a drop wire breaks, the oscillating movement of its bar 20 is interrupted and a latch 22 (Fig. is permitted to remain in the path of a shoulder 23 on an angle lever 24 which is regularly oscillated through a link 25 (Fig. 2) by a cam-actuated lever 26 (Fig. l).

The latch 22 is pivoted at 27 on a knock-off lever 28, which in turn is pivoted on a fixed stud 30 on which the lever 24: is also pivoted. If the latch 22 is engaged by the shoulder 23, the lever 28 is swung to the right in Fig. 2, pushing the knock-01f rod 32 to the right in Fig. l and releasing the shipper lever 33.

\Vhen there is no fallen drop wire to interfere with the oscillations of the vibrator bars 20, the bars are swung yieldingly in an anticlockwise direction by the upward movement of the link 25, and a stuc 35 (Fig. 3) engages the depending end 86 of the latch 22 and moves the latch to the dotted line position in Fig. 3, in which position the latch is out of the path of movement of the shoulder 28.

Motion is communicated from the actuating lever 24 to the vibrator bars 20 by connecting an extension A0 of the lever 24 to a U-shaped link 42., the lower end of which is pivoted at 43 to an arm 44 projecting laterally from an oscillating arm 45 in which one of the vibrator bars 20 is mounted.

A link 46 (Fig. 3) connects the arms 45 for a series of banks of drop wires. The connection of the arm 40 to the link 42 is through a compression spring 46 which yields whenever movement of the link 42 by the arm 40 is prevented.

The stop motion thus far described is similar in its general features and method of op erations to that shown in the prior patent to Holmes No. 1,360,638, issued November 30, 1920.

5 The above outlined description relates particularly to the stop motion unit B, but the units A and C are of very similar construction With the exception that most of the actuating andknock-otf mechanism is omitted.

The arm 44 of the unit B is connected to a. similar arm 50 of the unit C by an adjustable link 51 and the arm 50 is connected by an adjustable link 52 to a corresponding arm 54 of the unit A. Rocking motion of the actuating member 24 is thus communicated through the spring46 and link 42 to the arm 44 of the unit B and through the link 51 to I the arm 50 of the unit C and through the link 52 to the arm 54 of the unit A.

"3, All of the vibrator bars are thus rocked in unison vand are positively connected together so that if return movement of any one of the bars is prevented, the stud (Fig. 3) will remain in its left hand position, permitting the latch 22 to be engaged by the shoulder 23 and to thus cause the knock-oil rod 32 to be actuated.

I have thus trebled the capacity of the stop motion by adding the units A and C, which in. themselves are of extremely simple construction and which do not involve any duplication of the actuating or knock-off mechanism of the unit B.

I have thus avoided complication of the $5 warp stop mechanism-while at the same time providing capacity for a greatly increased number of Warp threads.

Having thus described my invention and the advantages thereof, I do not Wish to be limited to the details herein disclosed, otherwise than as set forth in the claim, but what I claim is V In a loom, a series of warp stop motion units mounted in substantially spaced rela- 4 tion, each unit comprising a separate frame, a plurality of vibrator bars mounted in said frame and link connected to oscillate together, a single actuating arm for the series of bars in each separate unit and associated therewith, a plurality of links pivotally connecting said actuatingarms, means to move said links to give said arms simultaneous swinging movements to oscillate said bars, a single loom stopping device mounted adja- 55 cent one of said stop motion units, normally inoperative actuating means on said unit for said loom stopping device, and means on said unit effective to render said actuating means operative to cause loom stoppage, said latter means being jointly controlled from every vibrator bar in all of said stop motion units.

In testimony whereof I have hereunto affixed my signature. JOHN REGAN. 

